claytongulick / template.js
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Came across this and needed an example where a calling function was passing in the variable. job is not explained how its declared in the example.
function name(name) < let m = ` title
$ < (() => < if(name == "jeff") < return `name does equal jeff`; >else < return `nope`; >>)() > `; > name("jeff"); const template = data => ` $ //we're just going to wrap an anonymous inline function here and then call it with some data (job => job ? `Edit Job
` : `Create Job
` )(data.job) //call the anonymous inline with the data we care about > `; console.info( template( job: false > ) );
@franz-josef-kaiser, thanks for the example, but as I mention in the comments:
//a quick example of how to use actual 'if' statements inside template literals, //without using ternary operator. Sometimes this is cleaner if you have complex conditionals or nested conditionals. The whole point of this gist is to demonstrate how to use an ‘if’ statement without the ternary operator. This is especially useful if you have a lot of if/else conditions.
JavaScript Syntax: Inline Ifs in String Assignment Statements
Javascript is interpreting the statement like:,Suppose you are assigning a string to a local variable and you want to vary it by a simple condition. So you insert an inline if statement into the string:, Meta Stack Overflow , Does the AstraZeneca vaccine not come in contact with any animal product during production?
It is of course to do with precedence.
var url = "beginning-" + (someCondition)?('middle'):('other_middle') + "-end"; var url = ("beginning-" + (someCondition)) ? ('middle') : (('other_middle') + "-end";) Answer by Ember Rush
var a = 2; var b = 3; var c = ((a < b) ? 'minor' : 'major');Answer by Silas Mathews
Besides false, possible falsy expressions are: null, NaN, 0, the empty string (""), and undefined. If condition is any of these, the result of the conditional expression will be the result of executing the expression exprIfFalse. ,An expression whose value is used as a condition.,Making decisions in your code — conditionals,SyntaxError: missing ) after condition
condition ? exprIfTrue : exprIfFalse Answer by Beatrice Castillo
If you open a Release 5.5 document in Interactive Reporting Release 6.x and the document contains computed columns with nested if. else statements, the Interactive Reporting JavaScript engine converts the if. else syntax to the inline if statement syntax. The conversion process does not change the meaning or value of the original if. else statement.,Scripting on this page enhances content navigation, but does not change the content in any way.,Inline if statements are alternatives to if. else statements. They use the conditional operator (?) to represent if statements and a colon (:) to representelse clauses. Such statements require three operands:,You can safely eliminate the condition parentheses, but omitting the quotes can cause problems.
Inline if statements are alternatives to if. else statements. They use the conditional operator ( ? ) to represent if statements and a colon (:) to represent else clauses. Such statements require three operands:
You should place the condition in parentheses and each expression in single or double quotes:
((condition == value)?'expr1':'expr2')Numbers do not require quotes.
For example, to display one message if a variable is true and another message if the variable is false, you can use this statement:
( isMember ? 'Member' : 'Not a member')You can also use the comparison operator:
((isMember == 'Yes' ) ? 'Member' : 'Not a member')If you want to nest inline if statements, (that is, use one inline if statement as an expression for another inline if statement), enclose the nested inline if statements in parentheses:
Answer by Griffin Delacruz
If condition is true then value1 will be assigned to result variable and if wrong then value2 will be assigned.,Differences between Functional Components and Class Components in React,MathematicsAlgebraTrigonometryStatisticsProbabilityGeometryMensurationCalculus,Javascript | Error and Exceptional Handling With Examples
result = condition ? value1 : value2; Answer by Hendrix Marquez
Sometimes, we need to assign a variable depending on a condition.,There can be more else if blocks. The final else is optional.,Sometimes, we need to perform different actions based on different conditions.,We don’t assign a result to a variable here. Instead, we execute different code depending on the condition.
let year = prompt('In which year was ECMAScript-2015 specification published?', ''); if (year == 2015) alert( 'You are right!' );Answer by Mya Duncan
In general, the syntax of the ternary operator is as follows:,The condition is an expression that evaluates to a Boolean value, either true or false. If the condition is true, the ternary operator returns expression_1, otherwise it returns the expression_2.,In this example, you can use the ternary operator as the shortcut for the if-else statement as follows:,In this example, the returned value of the ternary operator is the last value in the comma-separated list.
When you want to execute a block of code if a particular test evaluates to true , you often use the if-else statement. For example, if age is greater than 16 , then allow the person to drive can be coded as follows:
.wp-block-code < border: 0; padding: 0; >.wp-block-code > div < overflow: auto; >.shcb-language < border: 0; clip: rect(1px, 1px, 1px, 1px); -webkit-clip-path: inset(50%); clip-path: inset(50%); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; word-wrap: normal; word-break: normal; >.hljs < box-sizing: border-box; >.hljs.shcb-code-table < display: table; width: 100%; >.hljs.shcb-code-table > .shcb-loc < color: inherit; display: table-row; width: 100%; >.hljs.shcb-code-table .shcb-loc > span < display: table-cell; >.wp-block-code code.hljs:not(.shcb-wrap-lines) < white-space: pre; >.wp-block-code code.hljs.shcb-wrap-lines < white-space: pre-wrap; >.hljs.shcb-line-numbers < border-spacing: 0; counter-reset: line; >.hljs.shcb-line-numbers > .shcb-loc < counter-increment: line; >.hljs.shcb-line-numbers .shcb-loc > span < padding-left: 0.75em; >.hljs.shcb-line-numbers .shcb-loc::before < border-right: 1px solid #ddd; content: counter(line); display: table-cell; padding: 0 0.75em; text-align: right; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none; white-space: nowrap; width: 1%; >var age = 19; var canDrive; if (age > 16) < canDrive = 'yes'; >else < canDrive = 'no'; >Code language: JavaScript (javascript)In this example, you can use the ternary operator as the shortcut for the if-else statement as follows:
var age = 19; var canDrive = age > 16 ? 'yes' : 'no';Code language: JavaScript (javascript)In general, the syntax of the ternary operator is as follows:
condition ? expression_1 : expression_2;One of the typical uses of the ternary operator in ES5 is to set default parameters of a function, for example:
function foo(bar) < bar = typeof(bar) !== 'undefined' ? bar : 10; console.log(bar); >foo(); // 10 foo(20); // 20 Code language: JavaScript (javascript)It’s possible to perform multiple operations in each case of the ternary operator, each operation is separated by a comma. See the following example:
var authenticated = true; var nextURL = authenticated ? ( alert('You will redirect to admin area'), '/admin' ) : ( alert('Access denied'), '/403' ); // redirect to nextURL here console.log(nextURL); // '/admin' Code language: JavaScript (javascript)See the following example:
var locked = 1; var canChange = locked != 1 ? true : false; Code language: JavaScript (javascript)In this case, you can simplify it by using a Boolean expression as follows:
var locked = 1; var canChange = locked != 1; Code language: JavaScript (javascript)The following example shows how to use two ternary operators in the same expression:
var speed = 90; var message = speed >= 120 ? 'Too Fast' : (speed >= 80 ? 'Fast' : 'OK'); console.log(message); Code language: JavaScript (javascript)Answer by Patrick Vazquez
The if construct is one of the most important features of many languages, PHP included. It allows for conditional execution of code fragments. PHP features an if structure that is similar to that of C: , If statements can be nested infinitely within other if statements, which provides you with complete flexibility for conditional execution of the various parts of your program. , As described in the section about expressions, expression is evaluated to its Boolean value. If expression evaluates to true, PHP will execute statement, and if it evaluates to false - it'll ignore it. More information about what values evaluate to false can be found in the 'Converting to boolean' section. , Often you'd want to have more than one statement to be executed conditionally. Of course, there's no need to wrap each statement with an if clause. Instead, you can group several statements into a statement group. For example, this code would display a is bigger than b if $a is bigger than $b, and would then assign the value of $a into $b: